EDS coal liquefaction process development. Phase IV. Quarterly technical progress report, January 1-March 31, 1980

Technical Report · Tue Jul 01 00:00:00 EDT 1980

OSTI ID:5151433

Continuous bottoms recycle shakedown operations with Pittsburgh seam coal from the Ireland mine in West Virginia were initiated in the 50 pounds-per-day Recycle Coal Liquefaction Unit. Two combinations of pressure and solvent-to-coal-to-bottoms ratio were investigated at liquefaction conditions of 840/sup 0/F, 100 minutes nominal residence time, 4 weight percent hydrogen treat rate on coal, and a 4 or greater solvent quality index (SQI). Little effect of bottoms recycle on yield distribution was observed at 1500 psig compared to coal-only operations at those conditions. At 2500 psig, marked increases were observed for C/sub 1/-C/sub 3/ gas, C/sub 4/-400/sup 0/F naphtha and C/sub 4/-1000/sup 0/F liquid yields as well as conversion and hydrogen consumption. Elementally balanced yields are reported for bottoms recycle operations on Illinois No. 6 (Monterey No. 1 mine). These data confirm that higher pressure bottoms recycle substantially improves conversion and liquid yield compared to once-through, coal-only operations. High pressure liquefaction experiments with Illinois (Monterey mine) coal on the Once Through Coal Liquefaction Unit (OTCLU) showed that increasing temperature from 800 to 840/sup 0/F at 2000 psig increases the conversion by 7 wt % on coal. This increase is distributed among gas make, water make and C/sub 4//1000/sup 0/F liquid yield. A further increase in pressure to 2500 psig does not show any significant effect on yields. Correlations are being developed from the RCLU data base which allow the prediction of coal conversion and yield structure with bottoms recycle.

• Research Organization: Exxon Research and Engineering Co., Florham Park, NJ (USA)
• DOE Contract Number: AB01-77ET10069
• OSTI ID: 5151433
• Report Number(s): FE-2893-49
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
EXXON LIQUEFACTION PROCESS
BENCH-SCALE EXPERIMENTS
PILOT PLANTS
YIELDS
BOILER FUEL
COAL LIQUEFACTION
COAL LIQUEFACTION PLANTS
COKING
CORRELATIONS
DESIGN
EXPERIMENTAL DATA
GASIFICATION
HYDROGEN PRODUCTION
ORGANIC SOLVENTS
PRESSURE DEPENDENCE
RECYCLING
RESIDUES
TEXACO GASIFICATION PROCESS
CARBONIZATION
CHEMICAL REACTIONS
COAL GASIFICATION
DATA
DECOMPOSITION
FUELS
FUNCTIONAL MODELS
INDUSTRIAL PLANTS
INFORMATION
LIQUEFACTION
NUMERICAL DATA
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction